Lord Chantril is the patron of the sciences in Tempest. As such he is affiliated with the Atheneum, but he himself is not much of a scholar.
The Atheneum faction is all about providing options in the Tempest games. In Courtier, the Atheneum gives you access to a wider variety of cards, by virtue of their coterie ability.
As might be expected, Lord Chantril is part of their coterie, as the Patron.
Lord Chantril also appears in Dominare. His agent card shows him (by its wax seal) to be a member of the Atheneum, but note that his keyword line makes him a Noble, and not a Scholar. His meddlesome and patronizing manner do not ingratiate him with the educated people who teach at the Atheneum, but he is in his own element when gladhanding with the rich and powerful.
His level 2 ability allows him to tout the benefits of his university in any respectable part of Tempest, for, indeed, inventions and ideas from the Atheneum impact the way of life throughout the city.
His level 4 ability represents his leverage and access to wealth and talent. Never underestimate the impact an extra action can have on the game!